The tape includes eight minutes of cutbacks, jump stops, spin moves and slipped tackles that have not yet been broadcast on national television.

With limited sound and only one slow-motion replay, the tape acts as an underground treasure in Southern California. Watching it feels sort of like listening to a bootlegged copy of a Bob Dylan basement concert. “I don’t know who exactly has the tape right now,” Chase said. “But I know it’s been copied a lot.”